Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.0)
// Compass (v1.0.0.alpha.18)
// ----

$profile_themes: ( 
  basic: (
    title: (
      color: blue,
      font-family: Arial
    ),
    subtitle: (
      color: red,
      font-family: Tahoma
    )
  ),
  experimental: (
    title: (
      color: #000,
      font-family: Verdana
    ),
    subtitle: (
      color: #CCC,
      font-family: Tahoma
    )		
  )
);

@each $theme_name, $theme_items in $profile_themes {
  .theme-#{$theme_name} {
    @each $theme_properties_name, $theme_properties in $theme_items {
      .#{$theme_properties_name} {
        @each $item_attr, $item_value in $theme_properties {
          #{$item_attr}: $item_value;
        }
      }
    }
  }
}

SassMeister-output.css

.theme-basic .title {
  color: blue;
  font-family: Arial;
}
.theme-basic .subtitle {
  color: red;
  font-family: Tahoma;
}

.theme-experimental .title {
  color: black;
  font-family: Verdana;
}
.theme-experimental .subtitle {
  color: #cccccc;
  font-family: Tahoma;
}